Head and neck muscles often tighten during sexual activity, and blood pressure can increase at orgasm, causing blood vessels in the brain to dilate, a condition technically named coital cephalgia.
在活动,部和颈部的肌肉通常会收缩,而高潮时血压会增高。这些情况会导致大脑的血管扩张,在学术上这种情况被称为“交”。